Passport Application Services - Chapin 1249 Chapin Rd Chapin, SC 29036 Phone : (803) 345-5531 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Post Office - Chapin 1249 Chapin Rd Chapin, SC 29036 Phone : (803) 345-5531 Business Category Post Offices Toll-Free           (800) ASK-USPS